EXPRESS PROTRACTOR

EXPRESS PROTRACTORDepending on the processed material from each drill must be properly sharpened. To verify the correct angle will help a specially prepared square plate of copper or aluminium with a thickness of 1 mm.

To become operational protractor enough to cut it cut, as shown in the picture: a large cutout at an angle of 120 degrees, the other half is 60 degrees and the surviving corner of a square is 90.

Recommend to read

  • METRONOME-CONDUCTORMETRONOME-CONDUCTOR
    When learning to play a musical instrument to set the tempo often use a mechanical or electronic metronome. Last and I made one of the most popular modern developments. However,...
  • TRICYCLE “MARCH”TRICYCLE “MARCH”
    In the club of young technicians in the Novosibirsk Academic Town, in the laboratory of experimental modeling and design, off-road vehicles called "Marsh" tricycles have been designed and...